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Finding the Fourth Proportional to 1,044.81, 1,438.54 and 887.11

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Solution

The fourth proportional to 1,044.81, 1,438.54 and 887.11 is: 1,221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.81 : 1,438.54 = 887.11 : x
  2. Step 2: Convert to fraction form
    1,044.81/1,438.54 = 887.11/x
  3. Step 3: Cross multiply
    1,044.81x = 1,438.54 × 887.11
  4. Step 4: Simplify right side
    1,044.81x = 1,276,137.41
  5. Step 5: Solve for x
    x = 1,276,137.41/1,044.81
  6. Step 6: Final answer
    x = 1,221.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.